extern void OGL_resize(int width, int height);
extern void OGL_free();
extern const TCHAR * OGL_init(HWND ahwnd, int w_w, int w_h, int t_w, int t_h, int depth);
extern void OGL_render(void);
extern void OGL_getpixelformat(int depth, int* rb, int* bb, int* gb, int* rs, int* bs, int* gs, int* ab, int* ar, int* a);
extern void OGL_refresh(void);
extern HDC OGL_getDC(HDC hdc);
extern int OGL_isenabled(void);